Just go to the post office and buy envelopes and stamps. Just tell them it's an international letter and then tell them where the destination country is, and they will give you airmail envelopes and stamps with enough postage. Generally speaking, the postage of 6 yuan is enough, but my letter is a little overweight, because there is a Chinese knot in it, so I added a little more money after weighing it. Not too much.
You don't have to write in German. Bayern's letter openers all know English, but don't write in Chinese, they can't understand it. My letter was written in English, but I wrote my blessing in German. Because my German level is not enough to write letters at present. As for the content of the letter, I despise those routines that are summed up to please the letter opener. Since you are a fan, only you know how Qian Qian feels, so write down your heart. Blessing, expectation, suggestion, write whatever you want. Besides, it's not a bad thing to write about yourself and China. I think facts are more important than signatures.
Bayern does have two mailing addresses, which one ~ ~ to be honest, I am not particularly clear. But what is certain is that both are correct addresses. There is a saying that the one on Sebenne Street is more for players and team officials. Fans usually write to the second address, which makes it easier to get signature cards. I didn't hear about these until later. I searched online and found that it wasn't the one on Sebenne Street, so I wrote that one. All right, suit yourself.
It took me a long time to learn how to write an envelope. It's very different from China, and it's also more troublesome. Remember, the recipient's address is in the lower right corner and the sender's address is in the upper left corner. This is contrary to the situation in China. The address of the sender can give you a reference:
××× (name)
Xx province (province)
Xx city, 1320 13 (city, postal code)
XxX Road, XXX No.301,entrance 4 of Building 2 (XXX Road, Unit 502, Building 2, XX Community)
Page (abbreviation of page) China (must be capitalized)
Also, if you want a reply, don't forget to put a piece of paper in the letter and write down your address in Chinese according to the above format. So Bayern can paste it directly on the envelope and send it to you when replying. Moreover, if possible, you'd better go to the big post office to buy an international reply coupon and put it in the envelope. Bayern sent me a copy of this reply coupon, probably suggesting that I buy a real one, which can reduce the financial burden of the club. About 12 yuan. Only the post offices in big cities sell them, but we don't have them here. But it doesn't matter if you don't use that thing. I suspect that those letter openers are busy every day, and even if they are clipped, they may throw them away. Then you're wasting your money. Bayern's response rate can be said to be the highest among the major clubs, and they are very concerned about the fans. So even if you don't clip the reply coupon, they should reply.
There are four star cards in Bayern's reply to me, which are as big as postcards. The front is the signed photo of the player, and the back is the introduction of the German player. My four photos are a family photo of Kahn, Ram, Xiao Sheng and the whole team. I wrote to Bayern for the first time and received a reply. Unexpectedly. Not long ago, I just sent my second letter and established a good relationship with the club. I think there is always a process. Actually, I don't think it's the most important whether I was signed or given other gifts. For a Bayern fan, the most important thing is to write to the club and let them know our love and loyalty to Bayern. I have become a very lucky Bayern fan. Good luck.